Miter-box



(Ho Model.) 2 SheetsSheet 1. M. NICHOLLS.

MITER BOX Patented Apr. 2, 1895.

mtvu. EARN; m1: "7 JAZZ (Nd Model.) 2 Sheets-Sheet 2.

M. NIO HOLLS MITER BOX. No. 536,936. Patented Apr. 2, 11895.

2 imam qmimwm 5410911 606,

PATENT OFFICE.

MOSES NIOHOLLS, OF GLENWOOD, IOWA.

MlTER-BOX.

SPECIFICATION forming part of Letters Patent No. 536,936, dated April 2,1895. Application filed April 20, 1894. Serial No. 508,305. (No model.)

To all whom it may concern.-

Be 1t known that I, Mosns NIcHoLLs, of

Glenwood, county of Mills, State of Iowa, have nvented certain new anduseful Improvements in Miter-Boxes, of which the following 15 aspecification, reference being had to the accompanying drawings.The'jobject of my invention is to producean improved universal miter boxthat is simple and durable in construction; that can be convenlently setfor sawing all varieties of miters, and which can be manufactured at acomparatively small expense.

In the accompanying drawings: Figure I is an elevation of one side of mybox; Fig. II, an elevation of the other side; Fig. III, a top plan view.Fig. IV is a bottom plan view; Fig. V, a central vertical sectionthrough the saw frame. Referring to the figures on the drawings: 1indicates the bottom frame piece of my machine which is preferably madeof metal and in skeleton shape for sake of lightness. It is supportedpreferably upon legs 2 at its opposite ends.

3 indicates bed plates secured, as by set screws 5, each passing throughits respective slot 6 in the bottom frame piece. The bed plates haveopposite oblique faces 7 that define a sector shaped recess above thebottom frame piece. The edges of the bed plates project a small-distancebeyond the edges of the bottom frame piece and, entering thelongitudinal grooves 9 in thevertical guide plates 10, serve to holdthem rigidlyand accurately 1n position. The guide plates arelongitudinally adjustable and are held in engagement with thebed platesby the action of set screws 11 that pass through longitudinal slots 12in the vertical. guide plates'and are screwed into the edge of thebottom frame piece.

13'indicates lateral guide clips which may be adjustable withintransverse grooves 14 in the bed plates, a slot 15 and a set screw 16being provided for the purpose of adjustment. 17 indicates a swiveledframe eccentrically pivoted, as by a bolt 18 to the bottom of the bottomframe piece, beneath which it oscillates within the limits of an arc ofninety degrees. It is held in engagement with the side of the bottomframe piece opposite the bolt 18 by an angular retaining piece 19 thatoverlaps a rabbet 21 in the upper face of the quadrant 22 of the bottomframe piece. The swivel frame may be secured at any angle of adjustmentto the quadrant by an abutment screw 23 passing through the swivelframe, bearing 4 against the bottom of the bottom frame piece. Withinsuitable bearings 24 in the swivel frame is movably secured a rockingbar 25 that may be adjusted to any angle by means of,an abutment screw26, screwing into one side of the swivel frame and bearing against thebar. At opposite ends of the bar are firmly secured, as by screws 26,standards 27 having longitudinal slits or guide kerfs 28 extending fromthe tops of the standards, respectively to above the level of the uppersurface of the bed plates. V

29 indicates the longitudinal bores of the standards within whichrespectively are vertically movable saw guides 30, each having throughpart of its extent a slit 31 for the blade of the saw and a wideraperture 32 for the back of a tenon saw, said aperture being located inthe enlarged heads 33 of the saw guide. The lower ends of the saw guidesextend a considerable distance beyond the slit 31 in the shape of a halfcylinder, having a flat side 34.

35 indicates opposite apertures in the standards adapted to receive thediminished ends 36 of a saw blade support 37. The ends 36 of the sawblade support extend into the bore of the standards and, engaging withthe flat sides 35 of the saw guides, prevent their rotation. Theapertures 35 are of sufficient extent to permit an upward and downwardmovement of the saw blade support, so that when the standards are set atan angle of inclination to the perpendicular, the saw blade support mayrise and lift the saw so that its edge may not come into contact withthe hard metal of which the machine is mainly constructed. The saw bladesupport is for this reason preferably made of soft metal or wood and isof a diameter about equal to the thickness of the bed plates.

In operation, the swivel frame is set at the required angle, withrespect to the bottom frame piece, and the standards are set at theproper angle to the swivel frame. perceived that in the two movements ofthe standards the blade of thesaw will necessi- It will be 7 tatedifferent adjustments of the bed plates and vertical guide plates, inorder that the saw may have free swing and that the material to be cutmay be at the same time suitably supported. For this reason the severalindependent means of adjustment of the bed plates and the two verticalguide plates are provided, as above specified.

hat I claim is 1. In a miter box, the combination with a bottom framepiece and adjustable saw guide mechanism carried thereon, of bed platessecurable to the bottom frame piece and proj ectin g beyond the edgethereof, vertical guide plates provided with longitudinal grooves forthe reception of the projecting edges of the bed plates, means for adjustably securing the vertical guide plates in engagement with the bedplates to the bottom frame piece, and a saw blade support included inthe guide mechanism between the bed plates, substantially as set forth.

2. In a miter box, the combination with a bottom frame piece andvertically and horizontally adjustable saw guiding mechanism carriedthereon, of separate bed plates longitudinally adjustable upon thebottom frame piece, vertical guide plates independently adjustablethereon, saw blade support included in the guiding mechanism and locatedabove the bottom frame piece and flush with the surface of the bedplates whereby the material to be cut will be supported by the saw bladesupport, and bed plates or lateral clamps upon said bed plates,substantially as specified.

3. In a miter box, the combination with a bottom frame piece,longitudinally adjustable bed plates thereupon, and a swivel frameeccentrically pivoted underneath the bottom frame piece, of a rock barcarried in suitable bearings in the swivel frame, mechanism foradjusting the swivel frame upon the bottom frame piece, mechanism foradjusting the rock bar, saw guide standards secured to the rock bar, sawguides carried thereby, and a saw blade support above the bottom framepiece between and having its upper surface flush with the bed plates,substantially as specified.

4. In a miter box, the combination with a bottom frame piece and swivelframe secured thereto underneath the same, of saw guide standardsadjustably carried thereon, longitudin ally adjustable bed plates on thebottom frame piece, opposite elongated apertures in the standards, sawblade support above the bottom frame piece having its extremitiesengaging elongated apertures in the standards whereby the saw bladesupport may be susceptible of longitudinal movement with respect to thestandards, substantially as specified.

5. In a miter box, the combination with the bottom frame piece andswivel frame, of saw guide standards adjustable upon the swivel frame,cylindricai .saw guides carried in the standards, half cylinderprojections upon the ends of the saw guides, saw slits in the standards,and saw guides, respectively, op posite apertures in the standards, asaw blade support having diminished ends extending through the aperturesand into engagement with the flat sides of the half cylindricalextension of the saw guides, substantially as and for the purposespecified.

In testimony of all which I have hereunto subscribed my name.

MOSES NICIIOLLS.

Witnesses:

E. G. LUFKIN, JEANNE SIMoNs.

